<script>
import {ref} from 'vue'
</script>
<template>
<div>
    <div>
    <h1>全局组件-Demo15</h1>
    <h3>全局</h3><br>
    <h4 class="h33" >全局</h4>
    </div>

</div>
</template>
<style scoped>
h3{
    border: 5px solid green;
}
:deep(.h33){
    border: 5px solid pink;
}
</style>